TW201323890A - EMS test apparatus - Google Patents

Abstract

An EMS test apparatus includes a support part, an inductance coil, and an instrument box. The instrument box electronically connects to the inductance coil. The support part includes a holder and a supporting frame, the holder contains at least one trough on its sidewall, the trough is used to hold the body of a Gauss Meter. The inductance coil includes a circle coil and a connecter which connects the circle coil to the holder. The supporting frame is fixed to the connecter and extends to the circle coil on the radial of it. One end of the supporting frame holds the probe of the Gauss Meter, the end of the supporting frame can be moved to any position between the center of the circle coil and the connecter.

Description

Electromagnetic immunity test equipment

The invention relates to an electromagnetic immunity test device.

In the electromagnetic compatibility (EMC) power frequency magnetic field (PFMF) immunity test, the induction coil is usually used as one of the main test instruments. During the test, the induction coil is connected to a current source, and the current source energizes the induction coil, and the induction coil generates a magnetic field of a certain intensity and a certain frequency in a space surrounded by the induction coil. Usually, the operator holds the Gauss meter and places it in the space surrounded by the induction coil to measure the intensity of the induced magnetic field generated by the operator, thus causing certain damage to the operator's body. The object to be tested, typically electrical, electronic equipment for domestic, commercial, and industrial use, is placed in the magnetic field space to verify the magnetic field immunity of the object under test. The magnetic field space should be a relatively uniform magnetic field environment, otherwise it will easily lead to inaccurate test results.

In view of this, it is necessary to provide an electromagnetic immunity test apparatus which is safer, produces a more uniform magnetic field, and is convenient to operate.

An electromagnetic immunity test device comprises a bracket portion, an induction coil and an instrument box, and the instrument box is electrically connected to the induction coil. The bracket portion includes a carrier block and a support frame, and at least one side of the carrier block is provided with a card slot for carrying the body of the Gauss meter. The induction coil includes a toroidal coil and a connector for mounting the toroidal coil to the carrier block. The support frame is mounted on the connector and extends in the radial direction of the toroidal coil into the toroidal coil. The end of the support frame carries the probe of the Gauss meter, and the end of the support frame can be adjusted to the center position of the toroidal coil and the connector. Anywhere between.

The induction coil of the electromagnetic immunity test device uses a toroidal coil, and the magnetic field generated by the coil is relatively uniform compared with a general coil, and the effective magnetic field area is large. The electromagnetic immunity test device utilizes the card slot provided on the bearing block and the support clip of the support rod to respectively carry the body and the probe of the Gauss meter, without the operator holding the Gauss meter and placing it in the induction coil, the operator can Fix the Gauss meter and keep away from the induction coil in the test to detect damage to the operator's body. The carrier block is provided with two card slots on different faces of the carrier block, so that the operator can select the body of the Gauss meter to be placed in one of the card slots according to the relative position with the bracket portion, so that the operator can read the value. And the support frame can adjust the position of the support clip along the radial direction of the induction coil, so that the Gauss meter probe carried thereon can be measured at multiple positions in the induction coil. The electromagnetic immunity test device is conveniently and safely used during the test process.

Referring to FIG. 1 and FIG. 2, the electromagnetic immunity test apparatus 100 of the preferred embodiment of the present invention includes a bracket portion 10, an induction coil 50, and an instrument box 90. The induction coil is carried on the bracket portion 10 and electrically connected to the instrument case 90.

The bracket portion 10 includes a base 12 , a stand 20 connected to the base 12 , a column 30 disposed on the base 12 , a carrier block 40 slidably coupled to the column 30 , and a support frame 60 coupled to the carrier block 40 . .

The base 12 has a circular plate-like structure. The stand 20 includes at least three rod-shaped support legs 22 and a slide wheel 24 and a fixed leg 26 mounted on each support leg 22. The plurality of support legs 22 are spaced and fixed to the sides of the base 12 to stably support the base 12. The sliding wheel 24 is disposed at an end of the support leg 22 away from the base 12 for moving the entire electromagnetic immunity test apparatus 100. The fixing leg 26 is disposed on the outer side of the sliding wheel 24 for supporting the stand 20 . The fixed leg 26 includes an adjustable knob screw 262. After the stand 20 is slid to a designated position, the fixed leg 26 is extended downward to contact the ground by the lower turn adjustable knob screw 262 to fix the stand 20. After the fixed leg 26 contacts the ground, continuing to lower the adjustable knob screw 262 can fine tune the vertical height of the electromagnetic immunity test apparatus 100. The base 12 is adjusted to a level state by adjusting the range of rotation of the three adjustable knob screws 262. When the tripod 20 needs to be moved, the adjustable knob screw 262 can be rotated to retract the fixed leg 26 to leave the ground, and the stand 20 can be moved by sliding the sliding wheel 24.

The column 30 has a cylindrical structure, and the column 30 is erected and fixed at an intermediate position on the top surface of the base 12. Preferably, the uprights 30 are disposed perpendicular to the base 12.

The bearing block 40 is provided with a vertical through hole 41 and a horizontal through hole 42 , and a vertical opening 401 and a level opening 402 which are respectively connected to the vertical through hole 41 and the horizontal through hole 42 in the axial direction. The vertical through hole 41 is spaced apart from the horizontal through hole 42 and the axis is perpendicular. The carrier block 40 is sleeved on the column 30 through the vertical through hole 41 and is movable in the vertical direction along the column 30. The carrier block 40 is provided with two screws 44 respectively on the side of the vertical opening 401 and the level opening 402. The two screws 44 are perpendicular to and penetrate the vertical opening 401 and the level opening 402, respectively. By rotating the screw 44, the tension of the vertical opening 401 and the leveling opening 402 can be adjusted to secure the position of the carrier block 40 or to facilitate movement of the carrier block 40.

The carrier block 40 further includes two card slots 43 respectively disposed on one side of the vertical through hole 41 and one side of the level through hole 42 , and the two card slots 43 are respectively located on different sides of the carrier block 40 . The card slot 43 is used to carry a Gauss meter (not shown). A Gauss meter is used to detect the magnitude of the magnetic field strength of the induced magnetic field generated by the magnetic field induction coil 50. A typical Gaussian meter is divided into a body and a probe. The body is for the operator to read the value, and the probe is used to sense the magnetic field strength of the induced magnetic field generated by the magnetic field induction coil 50. The card slot 43 carries a body of a Gauss meter, and the operator can select one of the card slots 43 located at different end faces of the carrier block 40 according to the relative position of the operator and the electromagnetic immunity test device 100, which is convenient for the operator. Read the value for the Gauss meter. Before using the electromagnetic immunity test apparatus 100 to perform electromagnetic compatibility power frequency magnetic field immunity test, the intensity of the magnetic field generated by the electromagnetic immunity test apparatus 100 is corrected using a Gauss meter to ensure the electromagnetic immunity. The magnetic field generated by the test equipment 100 during the test conforms to the test standard and makes the test result more accurate.

The magnetic field induction coil 50 includes a toroidal coil 52 and a connector 54. The toroidal coil 52 includes a coil body and an extended end, and the connector 54 has a cylindrical shape that receives the extended end of the toroidal coil 52 therein. The connector 54 is partially received in the through hole 42 of the carrier block 40, and is screwed to the level opening 402 by the screw 44 to clamp the connector 54 to the leveling through hole 42. The circular coil 52 selected in this embodiment has a more uniform distribution than the magnetic field generated by the general coil, and the effective magnetic field area is large.

The support frame 60 is mounted on the connecting head 54 and is a telescopic three-stage structure that can be extended to the center position of the magnetic field induction coil 50 (as shown in FIG. 1 ), and can also be contracted and received in the connecting head 54 ( As shown in Figure 2, the length of the support frame 60 can be adjusted as desired to any length between the two extreme positions shown in Figures 1 and 2. A support clip 61 is disposed at one end of the support frame 60 away from the connector 54. The support clip 61 is a foldable clip for holding a probe of a Gauss meter (not shown). The operator can place the body of the Gauss meter in a card slot 43 and place the probe on the support clip 61, so that the operator can measure the magnetic field induction coil 50 without holding a Gauss meter, thereby reducing the harm to the operator. The operator can move the probe with the support clip 61 to any length within the range of movement of the support frame 60 to measure the magnetic field strength at each point in the magnetic field induction coil 50. The magnetic field induction coil 50 can support the frame 60 to rotate at an arbitrary angle to the axis. The screw 44 is rotated relative to the leveling opening 402 to release it, and the magnetic field induction coil 50 is rotated to change its polarity. The rotation of the magnetic field induction coil 50 and the conversion of the polarity are completed by rotating the screw 44 toward the level opening 402 to clamp the magnetic field induction coil 50.

The instrument case 90 is electrically connected to the extended end of the toroidal coil 52 via a connection line 300 with a mask mesh. The instrument case 90 energizes the induction coil 50 through the connection line 300. The mask net structure of the connection line 300 can block the interference of the external interference signal on the connection line 300 to protect the signal output by the instrument box 90. As with a typical instrument case, the instrument case 90 has a continuously adjustable output current. The output current of the instrument case 90 is transmitted to the induction coil 50. The instrument case 90 can be placed over the base 12 and the stand 20 of the bracket portion 10, with the carriage portion 10 moving or stationary.

The induction coil 50 is energized to form a loop circuit, and an induced magnetic field is generated in a space surrounded by the loop formed by the induction coil 50 according to the right-hand screw rule. The output current of the instrument case 90 is adjusted to adjust the magnitude of the magnetic field strength of the induced magnetic field formed by the induction coil 50.

Referring to FIG. 3, when the electromagnetic immunity power frequency magnetic field immunity test is performed by the electromagnetic immunity test apparatus 100, the space enclosed by the induction coil 50 is set to the normal work object 400, such as household and commercial. Or industrial electrical and electronic equipment. The magnitude of the output current is adjusted by the instrument box 90 to adjust the magnitude of the magnetic field strength of the induced magnetic field of the induction coil 50, thereby detecting the ability of the object 400 to operate normally under different magnetic field strengths.

In addition, when testing the different conditions of the three polarity of the magnetic sensing line passing through the object to be tested 400, the space enclosed by the induction coil 50 is placed over the object to be tested 400. Referring to FIG. 3, the magnetic induction line generated after the induction coil 50 is energized passes through the X-polar surface of the test object 400, and detects the ability of the test object 400 to work normally in the magnetic field environment. Referring to FIG. 4, the induction coil 50 is rotated to set the object to be tested 400 from another direction. The magnetic induction line generated after the induction coil 50 is energized passes through the Y-polar surface of the object to be tested 400, and the object to be tested is detected. 400 The ability to work properly in this magnetic field environment. Referring to FIG. 5, the object to be tested 400 is sleeved from the other direction in the induction coil 50. The magnetic induction line generated after the induction coil 50 is energized passes through the Z-polar surface of the object to be tested 400, and the object to be tested is detected. 400 The ability to work properly in this magnetic field environment. Thereby, the test of the magnetic induction lines passing through the faces of the three polarities of the object to be tested 400XYZ is completed.

The induction coil 50 of the electromagnetic immunity test apparatus 100 uses a toroidal coil 52, which produces a more uniform magnetic field distribution and a larger effective magnetic field area than a general coil. The electromagnetic immunity test apparatus 100 utilizes the card slot 43 provided on the carrier block 40 and the support clip 61 of the support frame 60 to respectively carry the body and the probe of the Gauss meter, without the operator holding the Gauss meter and placing it on the induction coil. In 50, the operator can fix the Gauss meter and away from the detecting coil 50 in the detection to reduce the damage caused by the detection to the operator's human body. The carrier block 40 is provided with two card slots 43 at different positions of the carrier block 40, so that the operator can select one of the card slots 43 according to the relative position of the bracket portion 10 to facilitate the operator to read. value. Moreover, the support frame 60 can adjust the position of the support clip 61 in the radial direction of the induction coil 50 so that the Gauss meter probe carried thereon can be measured at a plurality of positions within the induction coil 50. The electromagnetic immunity test apparatus 100 is conveniently used in the test process and is relatively safe.

It is to be understood that those skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.

100. . . Electromagnetic immunity test equipment

10. . . Bracket

12. . . Base

20. . . Tripod

twenty two. . . Support leg

twenty four. . . Sliding wheel

26. . . Fixed foot

262. . . Adjustable knob screw

30. . . Column

40. . . Carrier block

401. . . Vertical opening

402. . . Level opening

41. . . Vertical through hole

42. . . Level through hole

43. . . Card slot

44. . . Screw

50. . . Induction coil

52. . . Ring coil

54. . . Connector

60. . . Support frame

61. . . Support clip

90. . . Instrument box

300. . . Cable

400. . . Analyte

1 is a schematic diagram of an electromagnetic immunity test apparatus according to a preferred embodiment of the present invention.

2 is an exploded perspective view of the electromagnetic immunity test apparatus shown in FIG. 1.

3 is a schematic view of a surface of a magnetic induction line generated by an induction coil passing through a polarity direction of an object X to be tested.

4 is a schematic view showing a plane of magnetic induction generated by the induction coil passing through the direction of the polarity of the object Y to be tested.

Fig. 5 is a view showing a plane of magnetic induction generated by the induction coil passing through the direction of the polarity of the object Z.

100. . . Electromagnetic immunity test equipment

10. . . Bracket

12. . . Base

20. . . Tripod

twenty two. . . Support leg

twenty four. . . Sliding wheel

26. . . Fixed foot

262. . . Adjustable knob screw

30. . . Column

40. . . Carrier block

402. . . Level opening

41. . . Vertical through hole

42. . . Level through hole

43. . . Card slot

44. . . Screw

50. . . Induction coil

52. . . Ring coil

54. . . Connector

60. . . Support frame

61. . . Support clip

90. . . Instrument box

300. . . Cable

Claims (9)

An electromagnetic immunity test device includes a bracket portion, an induction coil and an instrument box, wherein the instrument box is electrically connected to the induction coil, and the improvement is that the bracket portion comprises a carrier block and a support frame, and at least one side of the carrier block is provided with one a card slot for carrying a body of a Gauss meter; the induction coil includes a toroidal coil and a connector for mounting the toroidal coil to the carrier block, the support frame being mounted on the connector and extending in a radial direction of the toroidal coil to In the toroidal coil, the end of the support frame carries a probe of a Gauss meter, and the end of the support frame can be adjusted to any position between the center position of the toroidal coil and the connector. The electromagnetic immunity test apparatus according to claim 1, wherein the bracket portion further includes a base, a stand connected to the base, and a column supported on the base, the stand supports the bracket, the column Connecting the carrier block. The electromagnetic immunity test apparatus according to claim 2, wherein the tripod comprises at least three rod-shaped support legs and a sliding wheel and a fixed foot mounted on each of the support legs, and the sliding wheel is used for moving The bracket portion is configured to support the tripod, and the fixing leg includes an adjustable knob screw for contacting the ground and finely adjusting the height of the bracket portion. The electromagnetic immunity test apparatus according to claim 2, wherein the bearing block is provided with a vertical through hole and a horizontal through hole, and the vertical through hole and the horizontal through hole are spaced apart, and the axis thereof is perpendicular. The vertical through hole is sleeved on the vertical column, so that the bearing block can move up and down along the vertical column, and the horizontal through hole is sleeved with the connecting head of the induction coil. The electromagnetic immunity test apparatus according to claim 4, wherein the bearing block is respectively provided with a vertical opening and a level opening in a direction of an axis of the vertical through hole and the horizontal through hole, and the bearing block is further Two screws perpendicular to and extending through the vertical opening and the level opening are respectively provided, and the two screws are rotated with the horizontal opening through opposite or opposite vertical openings to adjust the tightness of the vertical opening and the horizontal opening. The electromagnetic immunity test apparatus of claim 1, wherein the toroidal coil comprises a coil body and an extension portion, and the extension portion is received in the connection head, and the toroidal coil can be wound around the connector at any angle. The rotation. The electromagnetic immunity test apparatus according to claim 1, wherein the support frame is a retractable three-stage structure, and the end of the support frame is a support clip. The electromagnetic immunity test apparatus of claim 1, wherein the instrument case is connected to the induction coil through a connection line with a mask net. The electromagnetic immunity test apparatus according to claim 1, wherein the instrument box outputs a continuously adjustable output current to control a field strength of an induced magnetic field of the induction coil.